Artifacts Builder
nexu-io/open-design
Suite of tools for creating elaborate, multi-component claude.ai HTML artifacts using modern frontend web technologies (React, Tailwind CSS, shadcn/ui).
Shadow bleed and sibling Kototoro chrome artifacts that appear only with an artwork/image background — a nested pale plate, an octagon-shaped light island, or a dark rim inside top-bar pills, the…
Apache-2.0Auto-check passed
Install Kototoro Artwork Chrome Artifacts
$ npx skills add Kototoro-app/Kototoro --skill kototoro-artwork-chrome-artifacts -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Kototoro-app/Kototoro kototoro-artwork-chrome-artifacts --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/Kototoro-app/Kototoro.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.codex/skills/kototoro-artwork-chrome-artifacts .claude/skills/kototoro-artwork-chrome-artifacts && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "kototoro-artwork-chrome-artifacts" agent skill from https://github.com/Kototoro-app/Kototoro/tree/devel/.codex/skills/kototoro-artwork-chrome-artifacts into .claude/skills/kototoro-artwork-chrome-artifacts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "kototoro-artwork-chrome-artifacts", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/Kototoro-app/Kototoro/tree/devel/.codex/skills/kototoro-artwork-chrome-artifactsType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add Kototoro-app/Kototoro --skill kototoro-artwork-chrome-artifacts -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Kototoro-app/Kototoro kototoro-artwork-chrome-artifacts --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Kototoro-app/Kototoro.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.codex/skills/kototoro-artwork-chrome-artifacts .agents/skills/kototoro-artwork-chrome-artifacts && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "kototoro-artwork-chrome-artifacts" agent skill from https://github.com/Kototoro-app/Kototoro/tree/devel/.codex/skills/kototoro-artwork-chrome-artifacts into .agents/skills/kototoro-artwork-chrome-artifacts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "kototoro-artwork-chrome-artifacts", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add Kototoro-app/Kototoro --skill kototoro-artwork-chrome-artifacts -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Kototoro-app/Kototoro kototoro-artwork-chrome-artifacts --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Kototoro-app/Kototoro.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.codex/skills/kototoro-artwork-chrome-artifacts .cursor/skills/kototoro-artwork-chrome-artifacts && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "kototoro-artwork-chrome-artifacts" agent skill from https://github.com/Kototoro-app/Kototoro/tree/devel/.codex/skills/kototoro-artwork-chrome-artifacts into .cursor/skills/kototoro-artwork-chrome-artifacts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "kototoro-artwork-chrome-artifacts", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/Kototoro-app/Kototoro.git --path .codex/skills/kototoro-artwork-chrome-artifacts--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add Kototoro-app/Kototoro --skill kototoro-artwork-chrome-artifacts -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Kototoro-app/Kototoro kototoro-artwork-chrome-artifacts --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Kototoro-app/Kototoro.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.codex/skills/kototoro-artwork-chrome-artifacts .gemini/skills/kototoro-artwork-chrome-artifacts && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "kototoro-artwork-chrome-artifacts" agent skill from https://github.com/Kototoro-app/Kototoro/tree/devel/.codex/skills/kototoro-artwork-chrome-artifacts into .gemini/skills/kototoro-artwork-chrome-artifacts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "kototoro-artwork-chrome-artifacts", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install Kototoro-app/Kototoro kototoro-artwork-chrome-artifactsInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add Kototoro-app/Kototoro --skill kototoro-artwork-chrome-artifacts -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Kototoro-app/Kototoro.git skills-src && mkdir -p .github/skills && cp -r skills-src/.codex/skills/kototoro-artwork-chrome-artifacts .github/skills/kototoro-artwork-chrome-artifacts && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "kototoro-artwork-chrome-artifacts" agent skill from https://github.com/Kototoro-app/Kototoro/tree/devel/.codex/skills/kototoro-artwork-chrome-artifacts into .github/skills/kototoro-artwork-chrome-artifacts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "kototoro-artwork-chrome-artifacts", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add Kototoro-app/Kototoro --skill kototoro-artwork-chrome-artifacts -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Kototoro-app/Kototoro kototoro-artwork-chrome-artifacts --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Kototoro-app/Kototoro.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.codex/skills/kototoro-artwork-chrome-artifacts .opencode/skills/kototoro-artwork-chrome-artifacts && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "kototoro-artwork-chrome-artifacts" agent skill from https://github.com/Kototoro-app/Kototoro/tree/devel/.codex/skills/kototoro-artwork-chrome-artifacts into .opencode/skills/kototoro-artwork-chrome-artifacts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "kototoro-artwork-chrome-artifacts", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
kototoro-artwork-chrome-artifacts- GitHub stars
- 613
- Token cost
- ~1.3k tokens
- SKILL.md length
- 642 words
- Files
- 3
- Skills in repo
- 10
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Shadow bleed and sibling Kototoro chrome artifacts that appear only with an artwork/image background — a nested pale plate, an octagon-shaped light island, or a dark rim inside top-bar pills, the…
- Works in 4 steps: Read the live config. adb shell run-as… → Flip one variable per capture. Each flip… → Measure, don't look. A rotating backdrop… → …
- SKILL.md covers The rule: shadow bleed, Read the exemption before the…, Diagnosis loop (no rebuild) and Editing prefs on device, plus 2 more sections
- Runs Python scripts from its folder; calls adb
What it does
Kototoro Artwork Chrome Artifacts is an agent skill from Kototoro-app/Kototoro. Shadow bleed and sibling Kototoro chrome artifacts that appear only with an artwork/image background — a nested pale plate, an octagon-shaped light island, or a dark rim inside top-bar pills, the search button, bottom nav and other GlassSurface panels — plus the no-rebuild loop that locates which layer draws any Compose visual artifact, through prefs-only A/B, pixel metrics and pinned-library bytecode.
Its SKILL.md is about 1.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files (for example `agents/openai.yaml` and `artwork_probe.py`).
The repository describes itself as: Manga, Novel, and Video reader for Android. The licence is Apache-2.0.
Example prompts
- “/kototoro-artwork-chrome-artifacts”
Requirements
- Python 3
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Read the live config. adb shell run-as cat shared_prefs/_preferences.xml. This family reproduces with…
- Flip one variable per capture. Each flip removes the artifact for a different reason, so the pair localises the layer
- Measure, don't look. A rotating backdrop defeats absolute thresholds, so use interior uniformity: the p5–p95 luminance spread inside the…
- Confirm API behaviour in the pinned library. Wrong fixes here start from a guessed widget default. IconButton in this project's material3…
What it can do on your machine
Read from SKILL.md and the folder at commit 74bd979. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships script files (Python), which the agent can run.
Shell commands in SKILL.md call:
adb
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Kototoro Artwork Chrome Artifacts loads about 1.3k tokens when it runs. Until then it costs about 110 tokens; SKILL.md has 642 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from Kototoro-app/Kototoro at commit 74bd979, republished under its Apache-2.0 licence (© Kototoro-app). 642 words, ~1,289 tokens.
Download SKILL.mdSave it as
.claude/skills/kototoro-artwork-chrome-artifacts/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.- name
- kototoro-artwork-chrome-artifacts
- description
- Shadow bleed and sibling Kototoro chrome artifacts that appear only with an artwork/image background — a nested pale plate, an octagon-shaped light island, or a dark rim inside top-bar pills, the search button, bottom nav and other GlassSurface panels — plus the no-rebuild loop that locates which layer draws any Compose visual artifact, through prefs-only A/B, pixel metrics and pinned-library bytecode.
Kototoro Artwork Chrome Artifacts
For Kototoro-only chrome artifacts over an artwork background. The glass stack is the vendored Kyant Backdrop — module backdrop/, package com.kyant.backdrop — so load the backdrop skill alongside this one whenever the affected code imports it.
The rule: shadow bleed
A Material3 Surface whose color is translucent cannot hide its own shadow. The shadow draws behind the shape, reads through the fill as a dark rim hugging the inside of the outline, and leaves a smaller, brighter plate in the middle. Kototoro makes every glass role translucent over artwork (chrome 0.65–0.92, cards 0.40–0.74), so the shadow paints the artifact and no tint or alpha tuning can remove it.
internal fun resolveFallbackShadowElevation(
styleShadowElevation: Dp,
containerAlpha: Float,
flat: Boolean,
): Dp = if (flat || containerAlpha < 1f) 0.dp else styleShadowElevationGlassSurface's Material fallback routes through it, and so must any hand-rolled Surface(color = …translucent…, shadowElevation = …). Over artwork the hairline border already carries the edge, so dropping the shadow costs depth and nothing else.
Read the exemption before the symptom
"Every screen except X" names the mechanism. The details page was exempt because it is the only caller of TopBarControlSurface(fallbackContainerColor = …) — the one branch that forces copy(alpha = 1f). Read X's code early; it usually differs in exactly the layer under suspicion.
Diagnosis loop (no rebuild)
Style preferences alone add and remove this family of artifact, so keep the loop on prefs and pixels.
Read the live config.
adb shell run-as <pkg> cat shared_prefs/<pkg>_preferences.xml. This family reproduces withinterface_style=MATERIAL_3_EXPRESSIVE+background_style=DYNAMIC_ARTWORK_GALLERY. Done when both style values are read from the device rather than assumed from the report.Flip one variable per capture. Each flip removes the artifact for a different reason, so the pair localises the layer:
background_style=DEFAULTmakes fills opaque; artifact gone ⇒ the fill's transparency is load-bearing.interface_style=IOSswitches to the kyantdrawBackdroppath; artifact gone ⇒ the Material fallback draws it. Done when each surviving candidate is eliminated by its own capture.
Measure, don't look. A rotating backdrop defeats absolute thresholds, so use interior uniformity: the p5–p95 luminance spread inside the shape, discarding icon pixels below 150. Artifact reads 17.0 on a 44dp capsule; clean reads 1–2. The bright region's bounding box also sizes the culprit — 99px is a 30.5dp nested plate, 135px is the whole 44dp capsule. Done when before/after numbers come from the same mask over a matching backdrop.
Confirm API behaviour in the pinned library. Wrong fixes here start from a guessed widget default.
IconButtonin this project's material3 passestonalElevation = 0f/shadowElevation = 0fwhile the call site setscontainerColor = Transparent, so it draws nothing and any fix aimed at it is wasted — as one was. Check the AAR before blaming a widget:javap -p -c -classpath <extracted classes.jar> androidx.compose.material3.IconButtonKtDone when the suspect's real colours and elevations are quoted from bytecode or from the call site.
Show full SKILL.md (192 more words)Show less
Editing prefs on device
adb shell re-parses your command with the device shell, which consumes $ and >. Style values are ASCII enum names, so:
- Change a value:
adb shell run-as <pkg> sed -i s/OLD/NEW/ <prefs>. - Insert or delete a line: push a script file and run it, sidestepping inline quoting.
adb push x.sed /data/local/tmp/ && adb shell chmod 644 /data/local/tmp/x.sedadb shell run-as <pkg> sed -i -f /data/local/tmp/x.sed <prefs> - Force-stop before editing so the app cannot flush over the file; restore the reported values and a closing
</map>when done.
Pixel analysis without PIL
artwork_probe.py in this folder decodes PNG through zlib + numpy and prints the uniformity metric, the band map and the nested-plate signature — no imaging library needed on this machine. Pull captures to a file instead of redirecting adb exec-out: PowerShell rewrites > output as UTF-16 and corrupts the PNG.
Closing the loop
- Put the policy in a pure function and pin it with unit tests, e.g.
:app:testDebugUnitTest --tests "…GlassSurfacePolicyTest". - Compile and install the real build, then re-measure the same mask on the device; extract the numbers rather than describing the screenshot.
- Restore the user's original prefs and remove capture scratch before reporting.
© Kototoro-app, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 2 other files in .codex/skills/kototoro-artwork-chrome-artifacts of Kototoro-app/Kototoro.
- SKILL.md
- agents/openai.yaml
- artwork_probe.py
Open the folder on GitHubat commit 74bd979
Compare with similar skills
Kototoro Artwork Chrome Artifacts next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Kototoro Artwork Chrome Artifacts this skillKototoro-app/Kototoro | 613 | — | ~1.3k | Automated safety check: Pass | Apache-2.0 | |
| Artifacts Buildernexu-io/open-design | 100k | — | ~347 | Automated safety check: Pass | Apache-2.0 | |
| Web Artifacts Builderanthropics/skills | 180k | 40 repos | ~769 | Automated safety check: Pass | Apache-2.0 | |
| Web Artifacts Buildernexu-io/open-design | 100k | — | ~337 | Automated safety check: Pass | Apache-2.0 | |
| Web Artifacts Buildersickn33/agentic-awesome-skills | 47k | 3 repos | ~824 | Automated safety check: Pass | Apache-2.0 | |
| Claude In Chromeasgeirtj/system_prompts_leaks | 69k | — | ~1.2k | Automated safety check: Pass | CC0-1.0 |
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Questions about Kototoro Artwork Chrome Artifacts
What does Kototoro Artwork Chrome Artifacts do?
Shadow bleed and sibling Kototoro chrome artifacts that appear only with an artwork/image background — a nested pale plate, an octagon-shaped light island, or a dark rim inside top-bar pills, the…. Kototoro Artwork Chrome Artifacts is an agent skill from Kototoro-app/Kototoro. Shadow bleed and sibling Kototoro chrome artifacts that appear only with an artwork/image background — a nested pale plate, an octagon-shaped light island, or a dark rim inside top-bar pills, the search button, bottom nav and other GlassSurface panels — plus the no-rebuild loop that locates which layer draws any Compose visual artifact, through prefs-only A/B, pixel metrics and pinned-library bytecode.
How do I install Kototoro Artwork Chrome Artifacts in Claude Code?
Run `npx skills add Kototoro-app/Kototoro --skill kototoro-artwork-chrome-artifacts -a claude-code`. Or copy the skill folder (.codex/skills/kototoro-artwork-chrome-artifacts in Kototoro-app/Kototoro) into .claude/skills/kototoro-artwork-chrome-artifacts in your project. Claude Code loads it when a task matches its description.
How do I install Kototoro Artwork Chrome Artifacts in Codex?
Run `npx skills add Kototoro-app/Kototoro --skill kototoro-artwork-chrome-artifacts -a codex`. Or copy the skill folder (.codex/skills/kototoro-artwork-chrome-artifacts in Kototoro-app/Kototoro) into .agents/skills/kototoro-artwork-chrome-artifacts in your project. Codex loads it when a task matches its description.
Can I use Kototoro Artwork Chrome Artifacts in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Kototoro-app/Kototoro --skill kototoro-artwork-chrome-artifacts -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/kototoro-artwork-chrome-artifacts, .gemini/skills/kototoro-artwork-chrome-artifacts, .github/skills/kototoro-artwork-chrome-artifacts and .opencode/skills/kototoro-artwork-chrome-artifacts in your project.
What does Kototoro Artwork Chrome Artifacts need to run?
Going by SKILL.md and its folder, Kototoro Artwork Chrome Artifacts needs Python for the scripts in its folder and the command-line tools its instructions call (adb). Our summary lists: Python 3.
Does Kototoro Artwork Chrome Artifacts access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Kototoro Artwork Chrome Artifacts safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Kototoro Artwork Chrome Artifacts use?
Kototoro Artwork Chrome Artifacts is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Kototoro Artwork Chrome Artifacts use?
About 1.3k tokens (SKILL.md is roughly 5.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Kototoro Artwork Chrome Artifacts?
Skills that share tags, products or a category with Kototoro Artwork Chrome Artifacts: Artifacts Builder (nexu-io/open-design, 100k stars), Web Artifacts Builder (anthropics/skills, 180k stars), Web Artifacts Builder (nexu-io/open-design, 100k stars) and Web Artifacts Builder (sickn33/agentic-awesome-skills, 47k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Kototoro Artwork Chrome Artifacts?
Kototoro-app (a GitHub organization) maintains it in Kototoro-app/Kototoro, which has 613 GitHub stars. The repository holds 10 skills in this directory. The repository was last updated on October 9, 2026.
Source: Kototoro-app/Kototoro on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.